Piping.



G. W. GHRISTOPH.

- PIPING.

APPLICATION FILED JULY 24, 1907.

Patented Dec. 8, 1908.

v I J 'ATTORNE- WITNESSES I f l nst Arne parsnip Ohhlfifil GEORGE W.OHRISTOPH, or HARTFORD, CONNECTICUT, ASSIGNOR TO THE STERLING BLOWER &PIPE MFG. co, OF NEOTICUT.

HARTFORD, CONNECTICUT, A CORPORATION OF CON PIPING.

Specification of Letters Patent.

Patented Dec.

Application filed Jilly 2a, 1907. Serial No. 385,306.

To all whom it may concern:

Be it known that I, GEORGE W. Crisisrori-i, a citizen of United States,and resident of Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inPiping, of which the following is a full, clear, and eX- actspecification.

This invention relates to the manufacture of sheet metal pipes andtubes, and more especially to that class thereof which are usuallyemployed for conveying or carrying on material or substances somespecies of which maybe of more or .less gritty and abrasive nature, sothat the inner surface of the pipe or tube is subjected to considerablewear. This wear manifests itself especially in tubes (annoyed forcarrying-off the dust from grinding and polishing machinery, this dustconsistingof. particles of emery and metal which are comparatively heavya d are generally passed through the pipes by a strong air currentgenerated by an exhaust fan or blower. The inertia acquired by the dustis, therefore, considerable, and consequently the greatest wear willexist at the pipe-elbows,

the construct-ion of which is such as to afiord .cxt-ra life to thatportion thereof which has the greatest wear.

Practice has demonstrated the advisability of llltlhlllg the elbows ofthicker material than the straight pipe-sections, but under the regularsystem of manufacture, the entire elbow was made of this sameextra-thick stock, .and there was naturally a waste of material (at theunimportant portion) and also an increase in weight, which facts proveddetrimental especially in pipes of larger diameters. t

By my present invention, 1 am enabled to obviate these featuresentirely, inasmuch as I use stronger stock only on such portions of thecoinluiopipe where the matter to be transported comes into contacttherewith, while the other parts of the tubing can be made of any lightand cheap material, as long as it serves to preserve the required formof tube My invention, therefore, has for one of its objects theprovision of a conveyer-pipe or tube, each individual wear-receivinglength of which is composed of a plurality of longitudinal seamed parts,the wear-part being preferably of a heavier stock than its coactivetube-forming part, although the several parts may be made of the samestock, so that when the wear-exposed portion of the conduitbeconiesunfit. for use, only that particular part of the tube or elbow-sectionneed be replaced, instead. of providing an entirely new section. Myinvention has been clearly illustrated in the accompanying drawings, inwhich similar characters denote similar parts, and in which Figure 1represents a top view of a con? duit built up'of sections embodying myinvention, and Figs. 2 to 6, inclusive, are cross sections, on lines 22,to 66, respectively of Fig. 1. s

In forming conduit pipes, the several lengths are usually connected inconformity with the direction of the air-current passing through thesame, so that each length telescopes for a short distance into the nextsucceeding one. In the drawing, the air current is supposed to enterinto the conduit through the pipe length 10 at c, and the movement ofthe matter propelled by said current, is indicated by arrows. Hence wefind that the outer portion 11 of the elbow-length 11 will practicallytake all the wear, while the inner portion 11 receives none. In thesucceeding straight-pipe length 12 the matter will rub along on theportion 12% and be violently projected against the outer portion 13* ofthe elbow length 13, then rub along-the portion 143 of the straight-pipesection 141 for a short distance and subsequentlj? pass along over thebottom port-ion 15 of the next pipe section 15, and so on.

From the foregoing it will be understood that, generally speaking, onlya certain portion of each length sustains any actual wear while itsother portion serves merely to maintain the tubeformation, these severalco-acting portions being seamed together in the ordinary manner andsubstantially as shown at h.

Attention is called at this time to the com structions of theelbow-lengths l1, and 13, which differ from each other inasmuch as thelastaiamed is built up in the usual 1nanner and consists of a pluralityof telescoped sections, each of which may consist of a thickwear-receivingportion and a thin tubeforming portion; while theelbow-length 11 comprises a unitary outer portion corresponding innerportion 1. tions being disposed in area-ate 5 will be' circumferentiallylonger than the other (as shown), or the seams may come I K atdiametrically o posite sides, in which case both parts Won (1 be similarin size and shape.

10 While each individual pipe-length may be composed of a pair of seamedportions, occasion may demand a combinat on of three or more of suchport ons, as shown in Fig.

' 5, in which the pipe-length 14 consists of 5 three portions: 14, 1414c.

By virtue of my present invention I am enabled'to meet any desired.condition in the formation of conduits, since under this organizationthe lengths can be formed of Jeo- 'gitudinaledges, the outer part beingacting portions made of difierent materials, metallic or otherwise, at alow-cost of mann facture, and at a great saving in expense when comparedwith the usual or uniform type.

ii 1 h f 11 1. i een t -consistin o a ma it of longiti i dinal partssemi c lindiical cross section and made of di erent metals seamedtogether at their longitudinal edges.

2. A curved pipe length or elbow conslsting of a pairof co-acting partsdisposed in arcuate parallelism and united at their lonof stockdifierent from that of the mnerpar l.

' GEORGE CHRISTOPH. Witnesses: CHAS. F. ScHMELz, GEO. E. FRAY.

